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Created page with "{{Night Sky | image = | designation =Gamma Orionis<br/>24 Orionis | rightascension =05<sup>h</sup> 25<sup>m</sup> 07.8633<sup>s</sup><ref name=simbad>[http://si..."
{{Night Sky
| image =
| designation =Gamma Orionis<br/>24 Orionis
| rightascension =05<sup>h</sup> 25<sup>m</sup> 07.8633<sup>s</sup><ref name=simbad>[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Gamma+Orionis Gamma Orionis] from the [http://simbad.u-strasbg.fr/simbad SIMBAD Astronomical Database]</ref>
| declination =+06° 20′ 58.93.18″<ref name=simbad/>
| distance =252.45 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/bellatrix|title=Bellatrix, Gamma Orionis, 24 Orionis, HD35468, HIP25336, HR1790|accessdate=2018-12-28}}</ref>
| constellation =Orion
| type =
| dimensions =
| magnitude =Apparent Mag: +1.64<ref name=simbad/><br/>Absolute Mag: -2.80<ref name=universeguide/>
| redshift =
| radvelocity =18.2±0.9 km/s<ref name=simbad/>
| propmotion =RA: -8.11 mas/yr<ref name=simbad/><br/>Dec.: -12.11 mas/yr<ref name=simbad/>
| parallax =12.92±0.52<ref name=simbad/>
}}
'''Bellatrix''' (Gamma Orionis, 24 Orionis, sometimes called the Amazon star) is a [[giant star]] in the [[constellation]] of [[Orion]], the hunter.<ref name=universeguide/> Given its [[Bayer designation]] of Gamma, it is the thrid brightest star in Orion and the 27<sup>th</sup> brightest star in the nigh sky.<ref name=constellation-guide>{{cite web|url=https://www.constellation-guide.com/constellation-list/orion-constellation/|title=Orion Constellation|accessdate=2018-12-28}}</ref> The name Bellatrix means "female warrior" and may come either a [[latin]] translation of the [[Arabic]] title ''al-najid'' meaning "the conqueor" or possibly a modification of an alternate name for the contellation of Orion.<ref>{{cite web|url=https://www.britannica.com/science/astronomical-map/Star-names-and-designations#ref510234|title=Star Names And Designations|accessdate=2018-12-28}}</ref> it is one of the four stars used in celestial navigation, .<ref>{{cite web|url=https://osr.org/blog/astronomy/bellatrix/|title=Bellatrix – Star Facts|accessdate=2018-12-28}}</ref>
Bellatrix is a hot, luminous blue star and is also an eruptive [[variable star]].<ref name=constellation-guide/> These changes in the star's output are due to violent processes such as [[solar flare]]s.<ref>{{cite web|url=http://www.astro.keele.ac.uk/workx/superwasp-variable-stars/Eruptive.html|title=SuperWASP Observations of Variable Stars|accessdate=2018-12-28}}</ref> It's [[star magnitude|magnitude]] only varies slightly from +1.64 to a peak of +1.59, though since it only varies due eruptive events, it averages out to +1.64.<ref name=constellation-guide/> The star has a [[spectral type]] of B2 III and is one of the hottest stars visible to the naked eye; it has a [[temperature]] of 18,900 [[kelvin]].<ref name=universeguide/> The star used to be used as a standard candle but this stopped after its variable nature was discovered.
The original Hipparcos data from 1997 listed Bellatrix as lying 243.04 [[light year]]s from [[Earth]].<ref name=universeguide/> However the more recent 2007 release suggests it is slightly further away at 252.45 light years. The star is fairly large, with a mass 8-9 that of the [[Sun]] and a radius 3.18 times greater. Being larger, it emits around 6,400 times as much energy as the Sun.<ref name=constellation-guide/>
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]
| image =
| designation =Gamma Orionis<br/>24 Orionis
| rightascension =05<sup>h</sup> 25<sup>m</sup> 07.8633<sup>s</sup><ref name=simbad>[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Gamma+Orionis Gamma Orionis] from the [http://simbad.u-strasbg.fr/simbad SIMBAD Astronomical Database]</ref>
| declination =+06° 20′ 58.93.18″<ref name=simbad/>
| distance =252.45 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/bellatrix|title=Bellatrix, Gamma Orionis, 24 Orionis, HD35468, HIP25336, HR1790|accessdate=2018-12-28}}</ref>
| constellation =Orion
| type =
| dimensions =
| magnitude =Apparent Mag: +1.64<ref name=simbad/><br/>Absolute Mag: -2.80<ref name=universeguide/>
| redshift =
| radvelocity =18.2±0.9 km/s<ref name=simbad/>
| propmotion =RA: -8.11 mas/yr<ref name=simbad/><br/>Dec.: -12.11 mas/yr<ref name=simbad/>
| parallax =12.92±0.52<ref name=simbad/>
}}
'''Bellatrix''' (Gamma Orionis, 24 Orionis, sometimes called the Amazon star) is a [[giant star]] in the [[constellation]] of [[Orion]], the hunter.<ref name=universeguide/> Given its [[Bayer designation]] of Gamma, it is the thrid brightest star in Orion and the 27<sup>th</sup> brightest star in the nigh sky.<ref name=constellation-guide>{{cite web|url=https://www.constellation-guide.com/constellation-list/orion-constellation/|title=Orion Constellation|accessdate=2018-12-28}}</ref> The name Bellatrix means "female warrior" and may come either a [[latin]] translation of the [[Arabic]] title ''al-najid'' meaning "the conqueor" or possibly a modification of an alternate name for the contellation of Orion.<ref>{{cite web|url=https://www.britannica.com/science/astronomical-map/Star-names-and-designations#ref510234|title=Star Names And Designations|accessdate=2018-12-28}}</ref> it is one of the four stars used in celestial navigation, .<ref>{{cite web|url=https://osr.org/blog/astronomy/bellatrix/|title=Bellatrix – Star Facts|accessdate=2018-12-28}}</ref>
Bellatrix is a hot, luminous blue star and is also an eruptive [[variable star]].<ref name=constellation-guide/> These changes in the star's output are due to violent processes such as [[solar flare]]s.<ref>{{cite web|url=http://www.astro.keele.ac.uk/workx/superwasp-variable-stars/Eruptive.html|title=SuperWASP Observations of Variable Stars|accessdate=2018-12-28}}</ref> It's [[star magnitude|magnitude]] only varies slightly from +1.64 to a peak of +1.59, though since it only varies due eruptive events, it averages out to +1.64.<ref name=constellation-guide/> The star has a [[spectral type]] of B2 III and is one of the hottest stars visible to the naked eye; it has a [[temperature]] of 18,900 [[kelvin]].<ref name=universeguide/> The star used to be used as a standard candle but this stopped after its variable nature was discovered.
The original Hipparcos data from 1997 listed Bellatrix as lying 243.04 [[light year]]s from [[Earth]].<ref name=universeguide/> However the more recent 2007 release suggests it is slightly further away at 252.45 light years. The star is fairly large, with a mass 8-9 that of the [[Sun]] and a radius 3.18 times greater. Being larger, it emits around 6,400 times as much energy as the Sun.<ref name=constellation-guide/>
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]